.wrap {
  display: flex;
  width: 100%;
  height: 100%;
  .tree {
    flex-shrink: 0;
    flex-grow: 0;
    width: 250px;
    height: 100%;
    border-right: 2px solid #ccc;
  }
  .content {
    flex-grow: 1;
    height: 100%;
  }
}
